U. Radhakrishnan et M. Periasamy, REACTION OF THE RMGX FE(CO)(5)/CUCL SYSTEM WITH ALKYNES - NOVEL DOUBLE CARBONYLATION LEADING TO BUTENOLIDES AND CYCLOBUTENEDIONE/, Organometallics, 16(8), 1997, pp. 1800-1802
Reaction of RMgX with Fe(CO)(5) and CuCl leads to the formation of 1,2
-diketones in moderate yields. The reagent system gives the correspond
ing butenolides and cyclobutenedione in the presence of alkynes.